Abstract: Metamaterials are artificially constructed composite structural materials. By designing the structural parameters of units, we can realize a great wealth of wave functions and even break the wave response limit of traditional materials. Metamaterials have great potential application in civil and defense industries such as aerospace engineering, transportation, among others. First, we briefly introduce the basic concept, properties and development history of metamaterials. Then, we introduce the basic functions of metamaterials in detail from three aspects: Band gap induced vibration reduction and its intelligent design, low-frequency broadband noise reduction and energy harvesting. Furthermore, based on the multi requirements of practical applications, we introduce the design principles and properties of different types of multi-functions integrated metamaterials such as lightweight-load bearing-vibration/noise reduction integration and energy harvesting-vibration/noise reduction integration. Finally, we summarize the above research progress and give a perspective on the cross research of metamaterials with composite materials, artificial intelligence and non-Hermitian time-varying systems, which can further improve the performance and application ability of metamaterials in future.